American gridiron football player, who in 2002 became the all-time leading rusher in National Football League (NFL) history. He retired after the 2004 season with 18,355 yards rushing. He also holds records for most rushing touchdowns in a career (164) and in a single season (25 in 1995).

Smith excelled early in football, starring in youth leagues and, by the time he finished high school, earning national Player of the Year honours from Parade magazine, among other publications. He played three years (1987–89) at the University of Florida (in Gainesville), racking up 58 school records before being selected in the first round of the NFL draft by the Dallas Cowboys. Smith soon established himself as one of the league's premier running backs. He was named NFL Offensive Rookie of the Year in 1990 and the following season ran for 1,563 yards to capture the first of his four NFL rushing titles (the other three were in 1992–93, 1995). He led the Cowboys to back-to-back Super Bowl wins over the Buffalo Bills following the 1992 and 1993 seasons. In 1993 he earned Most Valuable Player trophies for both the regular season and the Super Bowl. A third Super Bowl championship followed the 1995 season. After the 2002 season Smith was released by the Cowboys and signed by the Arizona Cardinals.

Though Smith was relatively small—he stood only 1.75 metres (5 feet 9 inches) tall and weighed 96 kg (212 pounds)—and lacked great speed, he thrived in the NFL by relying on his strength, doggedness, and superb conditioning. He ultimately proved to be one of the NFL's most durable players at any position; between 1990 and 2002 he failed to start in only two games.